1, combat effectiveness. As an assassin defender, Zhan Zhao has both offensive and defensive skills. He can play, and Nalan is fragile, but the damage is low only in the back row, so naturally Zhan Zhao is better.

2. operation. Zhan Zhao's operation is simple, and he doesn't have complicated skills to deal with injuries, while Nalan's four skills are less harmful than Zhan Zhao's two skills. Nalan is just a healing guard.